Improvement in rock-drills



NiFETERS. FHOTO-LITHDGRAFHER, WASHINGTON D C i that@ amil ali GEORGE `arrnnrnrs, OE ronoHnEErsIE, NEW YORK, AssIGNOE 'ro HIMsELE, ADRIAN M. CORNELL, AND JAMES v. HAEBOTTLE, OE sAME PLAGE.

Leners raient No. 113,203, dated March 2s, 1871.

IMPROVEMENT IN ROCKDRLLS.

The Schedule referred to h1 these Letters Patent and making part of the same.

-To all 'whom it may concern:

Be it known thatI,- GEOnGE BPHILLIPS, of Poughkeepsie,.Dutchesscounty, in the State of New York, have invented certain' n'ew and useful Iinprovements in Rock-Drills; and I hereby declarethe' following to be a full'and exact description thereof, reference being had to the accompanyingdrawing forming part of this' specification.

The 'nature or essence of my invention consists in providing and combining several devices for the pur-r pose of operating a rock-drill, and adjusting its posi' shaft of the ily-wheel I and the faceplate P, whichsh`aft may he turnedby a belt on the pulley N o'r by a crank-handle insertedin .the wheel I, or otherwise; Upon this Shaft, between the. boxes L, I arrange the main standard R, the shaft passing through it.

This standard, which supports and holds the mech'- anism for` operating the drill, lhas a projection or lug,

z, en its under side, beneath the shaft, which, striking,

the stopt on the table F, prevents the standard from inclining tb the left,'wlile its inclination to the right, as circumstances may require, is securedlby means of the brace J sliding in the block-c, attached to the top of the standard.

Uponthe standard R are secured the upper guiding plate S and the lower guiding plate T, the latter holding, onlits under side, the standard V, supporting on one side the drill-guides dd. and ,on the other a guide for the sliding rod, G.

-A wristfpin on the plate P operates the connecting rod B, pivcted o n an arm, e, projecting from the sliding bar A, which has secured upon it the two liftingarms fand ,7, between which slides the lifting-bar D.

The angular drill-stock Q passes through cylinders held bythe plate S and by the guides d; and the bar E, extending from S to` T, has, on its opposite sides,` -the beveled blocks M andN, which pass through slots provided for that 4purpose in f and g, so as -to enter a corresponding slot iu the bar D.

- To operate the drill, the wheel I is turned by hand or other power, carrying with it the .plate P, on the same shaft.; and this plate, through the connectingrod B, traverses the sliding bar A, so as to raise and depress alternately the bar D, which slides endwise betweenftheplatesf and g,fslots being-provided in it for the rody G and the. bars A and VE to traverse in.

- As shown in the drawing, the bar iD projects .be- I neath the' lifting-plate G, 'fitted loosely onrthe stock Q, but, being acted on by the bar D only at one edge,

Vitraises the stock Qby the friction thus produced; 1. lbut when, by the further turning of the plate P,lh'e

baril) is raised high enough to cause the blocl N to enter the 'slot in its rear end, itis then drawn back "thereby, and the stock and the plate G are released andfallowed to fall.V

` "Ilo `rpake the stock and drill descend more promptly and withj greater force, a block, O, is placed above the plate @,contaiuing fourpivoted griping levers, t, or one freach side O f the stocks, their lower ends pressing'against and their projecting upper ends being inclined-from the stock, so thatwlien the coils ofthe spring'l are crowded down within these upper arms bythevrising of tbe block and consequent compression of the spring, the,lower arnis press more and more against the stock Q. When, therefore, the bar D` releases the stbck,'the spring k, acting against the block O, impels it downward,A at rst with great force, the v action of the spring and of the griping-levers gradu- A ally relaxing togetheu'so as to allow the drill tostrike the rock free.

The sliding rod C widens at its lower part,which has in it the oblique slot o, to receive the pin tprojecting from therturning-plate H, and islprovi'ded with the `stops mandm', by meansof which itis alternately raised and depressed, so as to vibrate the plate H.'

'The stock Q passes through two ratcli'le'ts,aand n', l the formerbeing held iu the guides d and the latter in the plate s, and both `provided with ratchets and.

pawls, the pawrfr of the upper ratchet being fastened to the plate S, and the pawls s of the lower one to the plate H, lso that when'Y this plate is vibrated, as just described, the ratchet u, and with it the stock and drill, are turned step by step, the ratchet 'and pawl in the plate S holding it as far as turned, and preventing its return. i

By adjusting the stops ou the rod C the length of the steps by which it is turned may be shortened or lengthened, at pleasure, or, in vother words, the pawl may be made to Apass one, two, or more teethof the ratchet at 4each stroke, as required.

, To reduce frlction,the rollers z' i are applied at theA y different sides of the stock Q;

It is obvious that-the blocksM andN maybe made adjustable, so as .to push forward and draw backward the bar D, at suchpoints as the adjustment of. other parts-orv the desired distance of fall forthe `drill may require, the plate P having holes at different distances from its center, in order to vary the length of the vibrations of the bar A.

lWhat I claim is- 1. The combination and arrangement of thfe wheel I, plate P, standard It, braces J, projection z, and

stop b, substantially as described.

2. The combination of the sliding bar A, plates f and g, lifting-bar D, and ixed bar E, provided with the beveled blocks M and N, arranged to operate substantially as described'.

3. :In combination with the drill-rod Q', theratchet-- wheels n and n', provided withpawls 'r and s, vibratingplate H,'sliding rod C, provided with oblique slot u v and stops m and mf, all substantially as described, for the purposes set forth.

Inv testimony whereof I have hereunto subscribed 

